Black cohosh (Cimicifuga racemosa)

When it comes to herbs, there's not a whole lot that's new under the sun. The same old plants are still out there soaking up rays. But in some cases, the ancient remedies derived from them are right back in style, this time with scientific underpinnings. Take, for example, black cohosh, the roots and underground stem of the North American forest plant Cimicifuga racemosa.